Links

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	National Association of Homebuilders (NAHB)
	Underwriters Laboratories (UL)
	Air Diffusion Council (ADC)
	Heating, Air Conditioning & Refrigeration Distributors International (HARDI)
	Air-Conditioning, Heating, and Refrigeration Institute (AHRI)
	ASHRAE
	Gas Appliance Manufacturers Association (GAMA)
	Air Conditioning Contractors of America (ACCA)
	Hearth, Patio & Barbecue Association (HPB)